hifi engine

Looking for the user manual/service manual for Cerwin Vega DM-1 / Cerwin Vega Dm-3

I am wondering if anyone could assist me with locating any of the following documents?

Brochure for Cerwin Vega Disco Products Circa 1977-1984

User / Service manuals for the following items:

Cerwin Vega DM-1 Audio Mixer

Cerwin Vega DM-3 Audio Mixer

Thank you in advance,